Macworld UK says:
River Thames gets free WiFi: “River Thames to get a free WiFi network, two million go online The river Thames is to get a free WiFi network after two companies, namely free-hotspot.com and MeshHopper partnered up to launch what they claim is Europe’s largest free metropolitian WiFi network.
Despite the liberal use of the word ‘free’ in the article, it’s really “15 mins of WiFi usage for every 15-30 second advert you watch”.
In other news, a new coffee shop offering free WiFi has opened up on Tower Bridge Rd, just south of the Bridge but before you cross underneath the railway lines. The address is something like 173 Tower Bridge Road, London SE 1 2AW but Google baulks at plotting that.